Solar Lights Made of Plastic Bottles & Water

The Brazilian engineer who came up with the idea did so in the midst of an energy blackout and crisis in 2002, as the first video below indicates. The 2-liter soda bottle lights are actually rated at 50-60 watts. Not bad. The lights have gotten the attention of normal folks and engineers alike, and have caught on a bit in some places. The idea has spread to the slums of Philippines, where every penny counts, through a program called “a liter of light.”